Nutsy

Nutsy is a squirrel that passes by Snot's apartment window when Stan arranges for him to go into a fake witness protection program to keep him from Steve in "Why Can't We Be Friends?".

When Steve finds out the truth and locates Snot, he finds Stan playing air guitar with him. As they argue over who is more suited to be his friend, Stan points out that Steve missed noting important things about Snot including that squirrels love him and gets confirmation from Nutsy.